Problem fmq
My friend has a 6700p Janome and is having a problem fmq. The top thread tension is causing the top thread to show on the back. We tried everything we could think of from making sure we had the right weight thread in bobbin and needle and the right size needle. We have gone through everything a hundred times it seemed like, but to no avail. Has anyone else ever had this problem, and if so, how did you correct it? And hints are most appreciated.